JPS6421176U - - Google Patents
Info
- Publication number
- JPS6421176U JPS6421176U JP11347587U JP11347587U JPS6421176U JP S6421176 U JPS6421176 U JP S6421176U JP 11347587 U JP11347587 U JP 11347587U JP 11347587 U JP11347587 U JP 11347587U JP S6421176 U JPS6421176 U JP S6421176U
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- output
- management location
- telephone line
- tone signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007423 decrease Effects 0.000 claims 1
- 230000007257 malfunction Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11347587U JPS6421176U (en]) | 1987-07-24 | 1987-07-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11347587U JPS6421176U (en]) | 1987-07-24 | 1987-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6421176U true JPS6421176U (en]) | 1989-02-02 |
Family
ID=31353345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11347587U Pending JPS6421176U (en]) | 1987-07-24 | 1987-07-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6421176U (en]) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62172850A (ja) * | 1986-01-27 | 1987-07-29 | Matsushita Electric Works Ltd | 通話装置 |
-
1987
- 1987-07-24 JP JP11347587U patent/JPS6421176U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62172850A (ja) * | 1986-01-27 | 1987-07-29 | Matsushita Electric Works Ltd | 通話装置 |
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